Chain pipe-wrench



' 'UNITED STATES PATENT QFFICEEQ CHARLES LUDIVIG MAI-INICKE, OF COLUMBUS, OHIO.

CHAIN PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 415,047, dated November 12, 1889.

- Application filed July 29, 1889- Serial No. 319,009. (No model.)

To all whom, it may concern.-

Be it known that 1, CHARLES LUDWIG MAHNIOKE, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented new and useful Improvements in Chain Pipe- WVrenches, of which the following is a specification.

My invention relates to chain pipe-Wren ches; and my improvement consists in the construction and arrangement or combination of parts hereinafter fully disclosed in the description,

drawings, and claims.

The objects of my invention are to provide improved means for adjusting and securing the chain in a chain pipe-wrench, to provide narrow notches in the edge ofa pipe-wrench for the edgewise insertions of thelinks of its chain, and to provide improved means for reversing the motion of the pipe without disengaging the wrench from the same. These objects I attain in the pipe-wrench illustrated in the accompanying drawings, forming part of this specification, in which the same referenceletters indicate the same parts, and in which Figure 1 represents a side view of my improved pipe-wrench ready for use; Fig. 2, a side view of the wrench applied to a pipe; Fig. 8, a view of the opposite side of the wrench, showing the wrench reversing the pipe; and Fig. 4, a top view of the wrench and pipe.

In the drawings, the letter A indicates the bar of the wrench, which consists of a head B, and a suitable stock or handle 0. The lower edge of said head B is cut out to form an obtuse V-shaped edge provided with teeth D, which face in opposite diverging directions,

A chain E is secured with one end upon a stud F upon the side of the head of the wrench, and the upper edge of the head of the wrench is beveled to form a rib or flange G,which has two forwardly-inclined notches H and I, of a sufficient width to admit a link of the chain edgewise and sufficiently narrow to stop a link presented crosswise.

In practice the chain is carried under the pipe to be turned, a link is slipped into the forward notch H, and the chain carried over the head of the wrench. It is thereupon carried under the pipe and over the head of the wrench, a link being slipped edgewise into the rear notch. The chain is stretched as tight as possible around the pipe, so as to clamp it tightly, and the chain will be held firmly in its adjusted tension by the links adjoining the links in the notches, bearing with their ends against the latter.

The teeth upon the V-shaped edge of the head will bite into the pipe and turn it when the wrench is rocked, and the pipe may be turned in one direction (indicated by an arrow in Fig. 2) when the outer set of teeth are in contact with the pipe and the handle of the wrench is raised, while the pipe may be turned in the opposite direction (indicated by the arrou in Fig. 3) when the inner set" of teeth bite into the pipe and the handle of the wrench is depressed.

It will be seen from the above that the wrench may be used to turn a pipe in opposite directions, from right to left, or vice versa, without removing it, and that, on account of a doubled chain being used, said chain may be tightened-or loosened one-half of the length of a link by moving the chain in the notches ing the chain with the head having the V- shaped toothed notch in its under side, the wrench gains advantage in convenience of manipulation, and, by securing the links of the chain both at the forward and rear end of the head and in the notches in the upper edge of the same, the chain will be thoroughly secured, free from danger of slipping, and the fastenings for the chain will be thoroughly safe, free from danger of being knocked off and broken, as separate notched 4 fastenings are liable to be.

Having thus fully described the construction and arrangement or combination of my improved chain pipe-wrench, its operation, and advantages, what I claim as new is 1. In a chain pipe-wrench, the combination, with a bar having two notches formed in the upper edge of its head at the forward and rear ends of said head, of a chain secured with one end at the inner end of said head, and

' adapted to be doubled over the forward end 'notches formed in the upper edge of its head at the forward and rear ends of the same, and having a stud upon one side of the inner end of said head, of a chain secured with one end to said stud and adapted to be doubled over the forward end of said head and to have two of its links held edgewise, one in each of said notches, substantially as described.

3. In a chain pipe-Wrench, the combination of the bar A, having the lower edge of: its head B formed with an obtuse V-shaped notch having oppositely-pointing teeth and having the notches H and I in its upper edge, of the chain E, secured to the inner end of said head and adapted to be doubled over the forward end of said head and to have two of its links held edgewise, one in each of said notches, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CHARLES LUD WIG MAIINIUKE.

\Vitnesses:

ALLEN S. FELCH, ARTHUR S. FELcI-I. 

